William h



(No Model.)

W. H. HOWELL. PULP GRINDER.

l Mk I il m Patented Feb. 1.3, 1883.

INVENTOR.

ATTORNEYS NITED STATES PATENT mos.

PULP-GRINDER.

SPECIFICATION forming part of Letters Patent No. 272,258, dated February13, 1853.

Application filed December 29, 1882. (No model.)

To all whom tt may concern.-

Be it known that I, WILLIAM H. HOWELL, of Thorold, in the county ofWelland, Province of Ontario, and Dominion of Canada, have inventedcertain new and useful Improvements in Pulp-Grinders; and I do herebydeclare that the following is a full, clear, and exact description ofthe invention, which will enable others skilled in the art to which itappertains to make and use the same, reference being bad to theaccompanying drawings, which form a part of this specification, and inwhich- Figure 1 is a vertical sectional view of my improvedpulp-grinder. Fig. 2 is a perspective view of the feeding mechanism,with part of the casing broken away; and Fig. 3 is a detail view of theadjusting mechanism.

Similar letters of reference indicate corresponding parts in all thefigures.

My invention has relation to that class of pulp-grinders where thematerial to be ground is fed by a spiral flange on the shaft into thegrinder, consisting of.. a. cone rotating inside an inverted cone: andit consists in the improved construction and combination of parts of thesame, as will hereinafter be more fully described.

In the accompanying drawings, the letter A represents the main shaft,which is rotated by a beveled cog-wheel meshing with a beveled pinion,B, which is keyed on the shaft, or in any other desired manner.

Upon the shaft is fastened a conical runner, O, of stone or metal, thesides of which are roughened or corrugated to operate with the roughenedor corrugated sides of an inverted conical bed, D. The angle of the cone0 is sharper than the angle of the inverted cone D,leavin g a largerspace at their apices, which point upward, between their sides than attheir bases.

The material to be ground is fed froma hopper, E, over the stones, whichareinclosed in a casing, F, and consists generally of finelydivided woodor straw, which is mixed with water entering the hopper through pipes G.From the hopper the material passes down into a cylindrical casing, H,which is fastened on top of the casing F and connected with the hopper;The innersurt'ace of this cylinder is provided with a spiral flange, I,which extends from the inside of the cylinder to the periphery of one ormore spiral flanges, J, fastened upon the shaft A. When the shaftturnsthe flanges J will feed the material mixed with'water intothegrinder,andtheflangeI,beingturneddown at its outer edge, as shown atK, prevents it from working up out of the cylinder. The edge k of theflange'l, being bent down, assists in keeping the material down,especially as it, being generally finely-divided wood or straw, has atendency to rise in the water while the spiral flanges mix it with thewater in feeding it.

To adjust the position'of the'conical runner C, which is fastened to theshaft in such a manner as to rotate with the shaft while it may beraised or lowered on it,'the lower end oft-he shaft is screw-threaded,as shown at L, while an annular disk, M, which has screwthreads on itsinner rim, bears against the bottom of the cone. To operate this diskfor raising or lowering the runner, it is provided with holes N in itsouter rim, into which fit iron handles 0, by which it maybe turned.

The-disk M bears against a disk, P, fastened around the shaft to thebase of the cone 0, and provided on its under side with holes Q, intowhich one or more set-screws, B, may be introduced, which pass throughthreaded holes in the disk M and prevent it from working it self looseand turning while the cone rotates. By this mechanism the space betweenthe runner and the bed may be adjusted according to the fineness towhich it is desired to grind the pulp.

Having th us described my invention, I claim and desire to secure byLetters Patent of the ment consisting of the annular disk M,screwthreaded on its inner rim, and provided with holes N for thereception of handles 0. and. set-screws R, screw-threaded part L of theshaft, and disk P, having holes Q for the reception of the set-screws R,substantially as set forth.

4. In a pulp-grinder of the described class, the combination of thehopper E, having waterpipes G, the cylindrical casing H, havingspirally-arranged plates I, bent downward at K, outer casing, F,bed-stone D, recessed to form an inverted cone, cone-shaped runner G,rotating with shaft A and having disk P, provid ed with holes Q, disk M,having inner screwthreaded rim, set-screws R, and holes N for thereception of handles 0, and shaft A, having spiral flanges J andscrew-threaded part L, all constructed and combined to operatesubstantially as and for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

WILLIAM HARMAN HOWELL.

Witnesses:

WILL A M. CARROLL, WM. CARTMILL.

